Quality Control Parameters for Robotic Bridge Painting

To protect a steel bridge from corrosion, periodic painting is needed. Bridge painting operations are dangerous and hazardous to human health. A robotic bridge painting system is being developed to replace the human being. One major problem with robotic bridge painting is how to achieve the specified coating quality, which includes two aspects: (1) the coating thickness; and (2) the coating appearance. To ensure quality of the robotic bridge painting, the writers have investigated: (1) the parameters that affect the coating thickness and appearance; (2) the values of the parameters to achieve the required thickness and appearance for the robotic painting; and (3) the thickness distribution functions of the bridge painting under various conditions. The specified painting quality can be achieved by using the results of this study to set up and control the robotic bridge painting system.     

Zero-forcing equalizability of FIR and IIR multichannel systemswith and without perfect measurements

We study the linear zero-forcing equalizability of a communication channel. Necessary and sufficient conditions are given in terms of the zeros of the transfer function. Detailed procedures of equalizer design for minimum sensitivity with respect to modeling errors and white noise are also presented. It is found that the worst case effect of channel mismatch on the performance may be modeled as equivalent losses in signal-to-noise ratio     

高速光纤通信线路DmB1M码型初探

本文介绍分析一种适合超高速光传输线路码型——DmB1M码的构成及其功率谱特性;并试制了D10B1M码的编/解码器;认为该码型有其独特的优点并适于超高速光传输系统。     

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根据储层物性参数以及其它影响因素,应用模栩数学建立了孔眯性玻酸盐岩储集层分类数学模型,并进行了纬合评刹分类.此法克服了长期以来储集层分类的片面性和机械性,使分类更加科学。     

地震相模式识别

地震层序内包含着不同的地震相带。地震剖面上对应于不同沉积相带可能呈现出不同的地震相特征,即不同的地震相模式。由地震剖面提取地震层序的地震相特征参量,并通过统计模式识别的方法划分出不同的地震相带,根据地震相带所具有的反射特征并结合钻井资料和其它地质资料可进行沉积相推断解释。对三角洲、冲积扇和湖盆三类陆相沉积地质模型的合成地震记录理论样本进行了分类试验,正确识别率达85％;对实际地震剖面也进行了试验,证明有用于实际资料的前景。     

白带，女性健康的晴雨表

女人，没有不希望自己所爱的人忠诚、专一的，所以在任何情况下都不能允许他好“色”，但女人对自己衣着的色彩却总是挑剔了又挑剔。     

我国首次发现的玉米尖翅蛾

玉米尖翅蛾是国内尚未见报道的一种蛾类仓库害虫。本文较为详尽地叙述了此虫成、幼虫的形态特征及初步观察的生活习性。     

多层半无限弹性体在任意荷载作用下的解析解

本文从柱坐标系下弹性力学基本方程出发，经关于方位角的Ｆｏｕｒｉｅｒ变换及关于径向的Ｈａｎｋｅｌ变换，建立了介质层的传递矩阵，利用层间完全接触条件，给出了多层半无限弹性体在任意荷载作用下的理论解。由于不必要引入应力函数，所以，本方法概念清晰、易懂、便于实际应用。     

A note on generalized hold functions

In this note, we study the generalized hold functions for use of digital control of continuous-time systems. First we define and solve the problem of simultaneous stabilization and minimization. It is shown that every plant with a strictly proper transfer function is simultaneously stabilizable and minimizable, provided that the sampling interval is small enough. We also consider robust designs of generalized hold functions. A condition is given for the stability of a system using generalized hold functions in the presence of uncertainty.